25351560 has 96 divisors (see below), whose sum is σ = 88746840. Its totient is φ = 6239232.

The previous prime is 25351559. The next prime is 25351609. The reversal of 25351560 is 6515352.

25351560 is a `hidden beast` number, since 2 + 53 + 51 + 560 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9622404 + 15729156 = 3102^2 + 3966^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1972 + ... + 7388.

Almost surely, 2^25351560 is an apocalyptic number.

25351560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25351560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44373420).

25351560 is an abundant number, since it is smaller than the sum of its proper divisors (63395280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25351560 is a wasteful number, since it uses less digits than its factorization.

25351560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5447 (or 5440 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 25351560 is about 5035.0332670202. The cubic root of 25351560 is about 293.7660223643.

It can be divided in two parts, 2535 and 1560, that added together give a triangular number (4095 = T₉₀).

The spelling of 25351560 in words is "twenty-five million, three hundred fifty-one thousand, five hundred sixty".